“Ironically, research shows that oral contraceptives might actually contribute to long-term sexual dysfunction in some women. The January 2006 issue of The Journal of Sexual Medicine reports that the pill lowers levels of testosterone, even after the women have stopped taking oral contraceptives. Such problems occur because pill users have elevated levels of a protein called sex hormone binding globulin (SHBG) that binds testosterone, rendering it unavailable for use by the body.” Excerpted from The pill Turns 50, June 2010
